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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 (
    7354, 7869, 3636, 7352, 4115, 3043, 7026, 
    7025, 7024, 7027, 6755, 6756, 6754, 
    5867, 5865, 5863, 5868, 5864, 5862, 
    5869, 6368, 6824, 5149, 6029
  )

Query time 0.00010

JSON explain

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