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 (
    9314, 9341, 9368, 9374, 9375, 9397, 9408, 
    9481, 9504, 9505, 9525, 8997, 9126, 
    9149, 9150, 9154, 9155, 9158, 9178, 
    9186, 9191, 9240, 9242, 9284, 9285, 
    9315, 9316, 9317, 9319, 9336, 9338, 
    9343, 9347, 9352, 9359, 9366, 9379, 
    9385, 9387, 9392, 9398, 9401, 9402, 
    9407, 9410, 9414, 9415, 9419, 9420, 
    9426, 9427, 9478, 9479, 9480, 9482, 
    9498, 9501, 9513, 9518, 9524, 8996, 
    8998, 9021, 9031, 9112, 9156, 9180, 
    9218, 9243, 9283, 9289, 9294, 9335, 
    9339, 9340, 9344, 9348, 9351, 9353, 
    9355
  )

Query time 0.00212

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "112.01"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 80,
          "rows_produced_per_join": 80,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (9314,9341,9368,9374,9375,9397,9408,9481,9504,9505,9525,8997,9126,9149,9150,9154,9155,9158,9178,9186,9191,9240,9242,9284,9285,9315,9316,9317,9319,9336,9338,9343,9347,9352,9359,9366,9379,9385,9387,9392,9398,9401,9402,9407,9410,9414,9415,9419,9420,9426,9427,9478,9479,9480,9482,9498,9501,9513,9518,9524,8996,8998,9021,9031,9112,9156,9180,9218,9243,9283,9289,9294,9335,9339,9340,9344,9348,9351,9353,9355))",
          "cost_info": {
            "read_cost": "48.01",
            "eval_cost": "8.00",
            "prefix_cost": "56.01",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 80,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.00",
            "eval_cost": "8.00",
            "prefix_cost": "84.01",
            "data_read_per_join": "31K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": [
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 80,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.00",
            "eval_cost": "8.00",
            "prefix_cost": "112.01",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}