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 (
    93584, 93585, 93586, 93587, 93588, 93589, 
    93590, 93591, 93592, 93593, 93594, 
    93595, 93596, 93597, 93598, 93599, 
    93600, 93601, 93602, 93603, 93604, 
    93605, 93606, 93607, 93608, 93609, 
    93610, 93611, 93612, 93613, 93614, 
    93615, 93616, 93617, 93618, 93619, 
    93620, 93621, 93622, 93623, 93624, 
    93625, 93626, 93627, 93628, 93629, 
    93630, 93631, 93632, 93633, 93634, 
    93635, 93636, 93637, 93638, 93639, 
    93640, 93641, 93642, 93643, 93644, 
    93645, 93646, 93647, 93648, 93649, 
    93650, 93651, 93652, 93653, 93654, 
    93655, 93656, 93657, 93658, 93659, 
    93660, 93661, 93662, 93663, 93664, 
    93665, 93666, 93667, 93668, 93669, 
    93670, 93671, 93672, 93673, 93674, 
    93675, 93676, 93677, 93678, 93679
  )

Query time 0.00054

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 (93584,93585,93586,93587,93588,93589,93590,93591,93592,93593,93594,93595,93596,93597,93598,93599,93600,93601,93602,93603,93604,93605,93606,93607,93608,93609,93610,93611,93612,93613,93614,93615,93616,93617,93618,93619,93620,93621,93622,93623,93624,93625,93626,93627,93628,93629,93630,93631,93632,93633,93634,93635,93636,93637,93638,93639,93640,93641,93642,93643,93644,93645,93646,93647,93648,93649,93650,93651,93652,93653,93654,93655,93656,93657,93658,93659,93660,93661,93662,93663,93664,93665,93666,93667,93668,93669,93670,93671,93672,93673,93674,93675,93676,93677,93678,93679))",
          "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"
          ]
        }
      }
    ]
  }
}