Ставлю в конце ковычку одинарную &id=5151' - вот что получаю в ответ:
MySQL error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '')' at line 1
Query: SELECT `id`, `name`, `uniqum`, `image`, `catsID` FROM `ap_products` WHERE `enable`=1 AND `id` IN(0,5151')