mysql5.7如何获取json数组里的某些值

json数组是这样的：
[
{"name":"a","score":20,"wrongID":[1,2,6,7]},
{"name":"b","score":50,"wrongID":[1,2,3,7]},
{"name":"c","score":40,"wrongID":[1,2,9,17]},
{"name":"d","score":70,"wrongID":[1,2,16,27]},
{"name":"e","score":80,"wrongID":[1,2,10,17]},
{"name":"f","score":50,"wrongID":[1,2,10,17,22,33]},
]

表名student，列名是examInfo
比如，我要获取数组里score为50的wrongID，要怎么获取呢？？
我之前写了一条sql：
select examInfo->'$[*].wrongID' from student where examInfo->'$[*].score'=50;
结果查不出来，没数据也没报错，50变成了'50'，结果也是一样，没数据。
有大牛知道怎么查吗？请教！！