I\'d like to search inside serialized array, data look like :
a:7:{i:0;s:2:\"34\";i:1;s:1:\"0\";i:2;s:2:\"42\";i:3;s:2:\"33\";i:4;s:2:\"48\";i:5;s:2:\"62\";i:6;s:2
You're building $id_serialize, but are using $serialize in the query string., so you're searching for ... LIKE '%%', most likely.
$id_serialize
$serialize
... LIKE '%%'