Sandbox

SELECT 
  p.product_id, 
  ifnull(
    count(dp.post_id), 
    0
  ) as discussion_amount_posts 
FROM 
  cscart_discussion 
  INNER JOIN cscart_products as p ON (
    cscart_discussion.object_id = p.product_id
  ) 
  INNER JOIN cscart_discussion_posts as dp ON (
    cscart_discussion.thread_id = dp.thread_id 
    AND cscart_discussion.object_type = 'P' 
    AND cscart_discussion.company_id = 1
  ) 
WHERE 
  dp.status = 'A' 
  and p.product_id in (
    51083, 
    22715, 
    51082, 
    51085, 
    51081, 
    51088, 
    51087, 
    22713, 
    51086, 
    51089, 
    51090, 
    51092, 
    51093, 
    22714, 
    51091, 
    51095, 
    51096, 
    51097, 
    51098, 
    51100, 
    51099, 
    22716, 
    51103, 
    22712, 
    51105, 
    51102, 
    51101, 
    51205, 
    51204, 
    51203, 
    51202, 
    125, 
    51209, 
    51208, 
    51207, 
    51206, 
    124, 
    111, 
    51212, 
    144, 
    51215, 
    51214, 
    51213, 
    51444, 
    51445, 
    51446, 
    51447, 
    51220, 
    51219, 
    51218, 
    51217, 
    51216, 
    146, 
    51448, 
    51449, 
    51221, 
    137, 
    51224, 
    51223, 
    51231, 
    51230, 
    51229, 
    51228, 
    51227, 
    51226, 
    51225, 
    109, 
    51232, 
    12, 
    51238, 
    51237, 
    51236, 
    51235, 
    51234, 
    51233, 
    51243, 
    51242, 
    51241, 
    51240, 
    51239, 
    36, 
    51246, 
    51245, 
    51244, 
    35, 
    51248, 
    51247, 
    51253, 
    51252, 
    51251, 
    51250, 
    51249, 
    34, 
    51256, 
    51255, 
    51254, 
    33, 
    32, 
    51265, 
    51264, 
    51263, 
    51262, 
    51261, 
    51260, 
    51259, 
    110, 
    51272, 
    51271, 
    51270, 
    51269, 
    51268, 
    51267, 
    51266, 
    145, 
    51273, 
    147, 
    51277, 
    51276, 
    51275, 
    51274, 
    51281, 
    51280, 
    51279, 
    51278, 
    51282, 
    7, 
    51289, 
    51288, 
    51287, 
    51286, 
    51285, 
    51284, 
    51283, 
    8, 
    51294, 
    51293, 
    51291, 
    51290, 
    94
  ) 
GROUP BY 
  p.product_id

Query time 0.00081

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}