Filter rows on data saved as JSON arrays

My data is saved as

_________________________________
id | category    | other data etc
--------------------------------
 1 | ["2","3"]   |bla bla
--------------------------------
 2 | ["254","34"]|bla bla
--------------------------------
 3 | ["11","25"] |bla bla
_________________________________

I want to select rows that have category=11. What SQL query should I use?