Sandbox

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 (
    7975, 7974, 7462, 7463, 6620, 7584, 7457, 
    7439, 7438, 7437, 6943, 7568, 7569, 
    6067, 6068, 7972, 7977, 7976, 7973, 
    2886, 2966, 6386, 6773, 6810
  )

Query time 0.00050

JSON explain

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