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SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    9755, 9756, 9757, 9758, 9759, 9760, 9761, 
    9762, 9763, 9764, 9765, 9766, 9767, 
    9768, 9769, 9770, 9771, 9772, 9773, 
    9774, 9775, 9776, 9777, 9778, 9779, 
    9780, 9781, 9782, 9783, 9784
  )

Query time 0.00038

JSON explain

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