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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 (
    8362, 8328, 8363, 7284, 7393, 8327, 8319, 
    7262, 7270, 7363, 7394, 7362, 7285, 
    7318, 7354, 8509, 7801, 7849, 7894, 
    7895, 7886, 7931, 7932, 7793, 7815, 
    8511, 8512
  )

Query time 0.00026

JSON explain

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