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 (
    352949, 353673, 354833, 358198, 351361, 
    353869, 357096, 350648, 350845, 355504, 
    355635, 359247, 359383, 351469, 351894, 
    352432, 352762, 357911, 355969, 351193, 
    354413, 351141, 351898, 351927, 356320, 
    357135, 349718, 351071, 351742, 351959, 
    352535, 354397, 357860, 351495, 352270, 
    353950, 349986, 350395, 351433, 355586, 
    357630, 350704, 358189, 351359, 351422, 
    352519, 353140, 359017, 350628, 353249, 
    353368, 354841, 358660, 354038, 358646, 
    358068, 351895, 351933, 354645, 350729, 
    355481, 356330, 357546, 358073, 352501, 
    355222, 355688, 351267, 351856, 352994, 
    359036, 359086, 359234, 355306, 356843, 
    358083, 359201, 349891, 349994, 350778, 
    351078, 351140, 351311, 352223, 353655, 
    354174, 354377, 354449, 354472, 355677, 
    357786, 349647, 350557, 354258, 357766, 
    354067, 350413, 354146, 354746, 354968
  )

Query time 0.00209

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "430.18"
    },
    "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": 100,
          "rows_produced_per_join": 100,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "120.12",
            "eval_cost": "20.00",
            "prefix_cost": "140.12",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ],
          "attached_condition": "(`webmarco`.`p`.`product_id` in (352949,353673,354833,358198,351361,353869,357096,350648,350845,355504,355635,359247,359383,351469,351894,352432,352762,357911,355969,351193,354413,351141,351898,351927,356320,357135,349718,351071,351742,351959,352535,354397,357860,351495,352270,353950,349986,350395,351433,355586,357630,350704,358189,351359,351422,352519,353140,359017,350628,353249,353368,354841,358660,354038,358646,358068,351895,351933,354645,350729,355481,356330,357546,358073,352501,355222,355688,351267,351856,352994,359036,359086,359234,355306,356843,358083,359201,349891,349994,350778,351078,351140,351311,352223,353655,354174,354377,354449,354472,355677,357786,349647,350557,354258,357766,354067,350413,354146,354746,354968))"
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "webmarco.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 100,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "100.00",
            "eval_cost": "20.00",
            "prefix_cost": "260.12",
            "data_read_per_join": "39K"
          },
          "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": [
            "webmarco.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 141,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "141.72",
            "eval_cost": "28.34",
            "prefix_cost": "430.18",
            "data_read_per_join": "14K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}