WHERE JSON_CONTAINS(data, '2', '$'); code example

Example 1: mysql json array contains

JSON_CONTAINS('[1,2,3,4,5]','7','$') Returns: 0
  JSON_CONTAINS('[1,2,3,4,5]','1','$') Returns: 1

Example 2: mysql json extract escape

SELECT JSON_EXTRACT('{"user.name": "Aztalan"}', '$."user.name"');