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 (
    91627, 83923, 82422, 89379, 89394, 89396, 
    89343, 89385, 89375, 89376, 89381, 
    89289, 89390, 89392, 89344, 89382, 
    89388, 89380, 89395, 89397, 89410, 
    89411, 89412, 82423, 89341, 89290, 
    91945, 91946, 91947, 91948, 91949, 
    91950, 91951, 89360, 89286, 89387, 
    89342, 89363, 89377, 89365, 89359, 
    89288, 89386, 89383, 89297, 89362, 
    89364, 89378, 82371, 89296, 89391, 
    89393, 89406, 89408, 89407, 90843, 
    89302, 89384, 89389, 89300, 89301, 
    89299, 89349, 89350, 89263, 89340, 
    82450, 82451, 89339, 89353, 89354, 
    82449, 89355, 89356, 89284, 89293, 
    91944, 89291, 89262, 89285, 82353, 
    89292, 82352, 89287, 89357, 89358, 
    82386, 89402, 89404, 89403, 89295, 
    89294, 89405, 89257, 82385, 89345
  )

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.05"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "f",
          "access_type": "ALL",
          "possible_keys": [
            "idx_group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.35",
            "data_read_per_join": "104"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.70",
            "data_read_per_join": "400"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "p",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "index_condition": "(`nuie_scalesta_net`.`p`.`product_id` in (91627,83923,82422,89379,89394,89396,89343,89385,89375,89376,89381,89289,89390,89392,89344,89382,89388,89380,89395,89397,89410,89411,89412,82423,89341,89290,91945,91946,91947,91948,91949,91950,91951,89360,89286,89387,89342,89363,89377,89365,89359,89288,89386,89383,89297,89362,89364,89378,82371,89296,89391,89393,89406,89408,89407,90843,89302,89384,89389,89300,89301,89299,89349,89350,89263,89340,82450,82451,89339,89353,89354,82449,89355,89356,89284,89293,91944,89291,89262,89285,82353,89292,82352,89287,89357,89358,82386,89402,89404,89403,89295,89294,89405,89257,82385,89345))",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "1.05",
            "data_read_per_join": "16"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      }
    ]
  }
}