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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 (
    243, 246, 244, 242, 245, 240, 290, 508, 
    295, 286, 259, 260, 249, 716, 719, 211, 
    253, 239, 93, 262, 325, 221, 809, 254, 
    1237, 271, 1009, 264, 725, 250, 266, 
    235, 873, 872, 875, 874, 666, 300, 669, 
    664, 309, 287, 288, 668, 667, 308, 662, 
    663
  )

Query time 0.00059

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}