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 (
    55, 92, 143, 280, 337, 339, 506, 510, 516, 
    517, 526, 527, 528, 529, 530, 1562, 1563, 
    1564, 1565, 1566, 1567, 1568, 1569, 
    1570, 5477, 5556, 5473, 1843, 1841, 
    1840, 486, 1842
  ) 
GROUP BY 
  p.product_id