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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 (
    7198, 5065, 3654, 2237, 3435, 1486, 1083, 
    1231, 1485, 2238, 3427, 3437, 3502, 
    3501, 3436, 7751, 6072, 5603, 6710, 
    4839, 4838, 7593, 7594, 7595
  )

Query time 0.00023

JSON explain

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