mysql-请教存储过程执行很慢，如何优化？

BEGIN
DECLARE personPlaneId BIGINT;

DECLARE starttime datetime; #开始时间
DECLARE endtime datetime; #结束时间
DECLARE sumStudyTime INT; #当前学时
DECLARE targetStudyTime INT; #目标学时
DECLARE id1_count BIGINT default 0; #t_stage_info 第一阶段count
DECLARE id2_count BIGINT default 0; #t_stage_info 第二阶段count
DECLARE id3_count BIGINT default 0; #t_stage_info 第三阶段count
DECLARE firstEndTime datetime; #第一阶段结束时间
DECLARE secEndTime datetime; #第二阶段结束时间
DECLARE thirdEndTime datetime; #第三阶段结束时间
DECLARE done INT DEFAULT 0;

    #声明光标        DECLARE cur1 CURSOR FOR            SELECT p1.id,            p1.start_learn_time start_time,            p1.last_date end_time,            p1.sum_study_time,p1.target_study_time             FROM t_person_plan p1 LEFT JOIN t_person_plan_record p2              ON p1.id = p2.person_plan_id WHERE p1.license_type = 7              AND p1.last_date <= CURRENT_DATE();#t_person_plan_record p2 这个表数据大概500多万条    #当游标到达尾部时，mysql自动设置done=1  declare continue handler for SQLSTATE '02000' SET done = 1;        OPEN cur1;          REPEAT             /* 移动游标并赋值 */      fetch cur1 into personPlaneId,startTime,endTime,sumStudyTime,targetStudyTime;             if NOT done  then                           #获取第一阶段结束时间                        SET firstEndTime = (SELECT add_time FROM t_person_plan_record WHERE person_plan_id=personPlaneId AND chapter_id=29611);                        #获取第二阶段结束时间                        SET secEndTime = (SELECT add_time FROM t_person_plan_record WHERE person_plan_id=personPlaneId AND chapter_id=29625);                        #获取第三阶段结束时间                        SET thirdEndTime = (SELECT add_time FROM t_person_plan_record WHERE person_plan_id=personPlaneId AND chapter_id=29734);                        #获取主键标识                        SELECT count(1) into id1_count from t_stage_info where person_plan_id=personPlaneId AND stage=1;                        SELECT count(1) into id2_count from t_stage_info where person_plan_id=personPlaneId AND stage=2;                        SELECT count(1) into id3_count from t_stage_info where person_plan_id=personPlaneId AND stage=3;                    IF sumStudyTime <= 12 THEN                        IF id1_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,startTime,endTime,sumStudyTime,targetStudyTime,1);                         ELSE                            UPDATE t_stage_info SET end_time=endTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=1;                        END IF;                    #当学到第二阶段时                    ELSEIF sumStudyTime>12 AND sumStudyTime<=14 THEN                        #更新第一阶段数据                         IF id1_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,startTime,firstEndTime,sumStudyTime,targetStudyTime,1);                         ELSE                            UPDATE t_stage_info SET end_time=firstEndTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=1;                        END IF;                        #更新第二阶段数据                        IF id2_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,firstEndTime,endTime,sumStudyTime,targetStudyTime,2);                         ELSE                            UPDATE t_stage_info SET end_time=endTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=2;                        END IF;                    #当学到第三阶段时                    ELSEIF sumStudyTime>14 THEN                        #如果thirdEndTime为空则取最后学习的时间                        SET thirdEndTime = CASE WHEN thirdEndTime IS NULL THEN endTime ELSE thirdEndTime END;                        #更新第一阶段数据                        IF id1_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,startTime,firstEndTime,sumStudyTime,targetStudyTime,1);                         ELSE                            UPDATE t_stage_info SET end_time=firstEndTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=1;                        END IF;                        #更新第二阶段数据                        IF id2_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,firstEndTime,secEndTime,sumStudyTime,targetStudyTime,2);                         ELSE                            UPDATE t_stage_info SET end_time=secEndTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=2;                        END IF;                        #更新第三阶段数据                        IF id3_count=0 THEN                            INSERT INTO t_stage_info(person_plan_id,start_time,end_time,sum_study_time,target_study_time,stage)                                 VALUES(personPlaneId,secEndTime,thirdEndTime,sumStudyTime,targetStudyTime,3);                         ELSE                            UPDATE t_stage_info SET end_time=thirdEndTime,sum_study_time=sumStudyTime WHERE person_plan_id=personPlaneId AND stage=3;                        END IF;                    END IF;    end if;        UNTIL done END REPEAT;      close cur1; 

END
现在执行了2小时才有了10几万数据，
我在t_person_plan_record 表里对‘person_plan_id ’建了索引，
在表t_stage_info 对person_plan_id ’建立了索引，其他我就不知道怎么优化了，
请问大神，还能怎么优化比较好呢？