SELECT 
  tmall_product_feature_variant_descriptions.variant, 
  tmall_product_feature_variants.variant_id, 
  tmall_product_feature_variants.feature_id, 
  tmall_product_features_values.variant_id as selected, 
  tmall_product_features.feature_type, 
  tmall_product_feature_variants.color, 
  tmall_product_features_values.value_int, 
  tmall_product_feature_variants.abt__ut2_multicolor, 
  tmall_product_feature_variants.abt__ut2_color_style 
FROM 
  tmall_product_feature_variants 
  LEFT JOIN tmall_product_feature_variant_descriptions ON tmall_product_feature_variant_descriptions.variant_id = tmall_product_feature_variants.variant_id 
  AND tmall_product_feature_variant_descriptions.lang_code = 'en' 
  INNER JOIN tmall_product_features_values ON tmall_product_features_values.variant_id = tmall_product_feature_variants.variant_id 
  AND tmall_product_features_values.lang_code = 'en' 
  AND tmall_product_features_values.product_id = 228 
  AND tmall_product_features_values.feature_id = tmall_product_feature_variants.feature_id 
  LEFT JOIN tmall_product_features ON tmall_product_features.feature_id = tmall_product_feature_variants.feature_id 
WHERE 
  1 
  AND tmall_product_feature_variants.feature_id IN (16) 
GROUP BY 
  tmall_product_feature_variants.variant_id 
ORDER BY 
  tmall_product_feature_variants.position, 
  tmall_product_feature_variant_descriptions.variant

Query time 0.00958

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.007825889,
    "filesort": {
      "sort_key": "tmall_product_feature_variants.position, tmall_product_feature_variant_descriptions.variant",
      "temporary_table": {
        "nested_loop": [
          {
            "table": {
              "table_name": "tmall_product_features_values",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "fl",
                "variant_id",
                "lang_code",
                "product_id",
                "fpl",
                "idx_product_feature_variant_id"
              ],
              "key": "PRIMARY",
              "key_length": "6",
              "used_key_parts": ["feature_id", "product_id"],
              "ref": ["const", "const"],
              "loops": 1,
              "rows": 1,
              "cost": 0.002024411,
              "filtered": 17.55319214,
              "index_condition": "tmall_product_features_values.lang_code = 'en'",
              "attached_condition": "tmall_product_features_values.feature_id <=> 16 and tmall_product_features_values.product_id <=> 228"
            }
          },
          {
            "table": {
              "table_name": "tmall_product_feature_variants",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY", "feature_id"],
              "key": "PRIMARY",
              "key_length": "3",
              "used_key_parts": ["variant_id"],
              "ref": ["tmall.tmall_product_features_values.variant_id"],
              "loops": 1,
              "rows": 1,
              "cost": 0.001933826,
              "filtered": 7.692307472,
              "attached_condition": "tmall_product_feature_variants.feature_id = 16"
            }
          },
          {
            "table": {
              "table_name": "tmall_product_features",
              "access_type": "const",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "3",
              "used_key_parts": ["feature_id"],
              "ref": ["const"],
              "loops": 1,
              "rows": 1,
              "cost": 0.001933826,
              "filtered": 100
            }
          },
          {
            "table": {
              "table_name": "tmall_product_feature_variant_descriptions",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "9",
              "used_key_parts": ["variant_id", "lang_code"],
              "ref": ["tmall.tmall_product_features_values.variant_id", "const"],
              "loops": 1,
              "rows": 1,
              "cost": 0.001933826,
              "filtered": 100,
              "attached_condition": "trigcond(tmall_product_feature_variant_descriptions.lang_code = 'en')"
            }
          }
        ]
      }
    }
  }
}