SELECT 
  cscart_product_features.feature_id, 
  cscart_product_features.feature_type, 
  cscart_product_features_descriptions.description as name, 
  CASE WHEN (
    cscart_product_features.feature_type IN ('M', 'S', 'E')
  ) THEN GROUP_CONCAT(
    cscart_product_feature_variant_descriptions.variant
  ) ELSE CASE WHEN (
    cscart_product_features.feature_type IN ('O')
  ) THEN cscart_product_features_values.value_int ELSE cscart_product_features_values.value END END as val 
FROM 
  cscart_product_features 
  INNER JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = cscart_product_features.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'en' 
  INNER JOIN cscart_product_features_values ON cscart_product_features_values.feature_id = cscart_product_features_descriptions.feature_id 
  AND cscart_product_features_values.product_id = 25313 
  AND cscart_product_features_values.lang_code = 'en' 
  LEFT JOIN cscart_product_feature_variants ON cscart_product_feature_variants.variant_id = cscart_product_features_values.variant_id 
  LEFT JOIN cscart_product_feature_variant_descriptions ON cscart_product_feature_variants.variant_id = cscart_product_feature_variant_descriptions.variant_id 
  AND cscart_product_feature_variant_descriptions.lang_code = 'en' 
GROUP BY 
  cscart_product_features.feature_id

Query time 0.00178

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "32.30"
    },
    "grouping_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "6.92"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_features_descriptions",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 106,
            "rows_produced_per_join": 10,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "9.79",
              "eval_cost": "1.06",
              "prefix_cost": "10.85",
              "data_read_per_join": "24K"
            },
            "used_columns": [
              "feature_id",
              "description",
              "lang_code"
            ],
            "attached_condition": "(`cscart_db`.`cscart_product_features_descriptions`.`lang_code` = 'en')"
          }
        },
        {
          "table": {
            "table_name": "cscart_product_features_values",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY",
              "lang_code",
              "product_id",
              "fpl",
              "idx_product_feature_variant_id",
              "fl"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "feature_id",
              "product_id"
            ],
            "key_length": "6",
            "ref": [
              "cscart_db.cscart_product_features_descriptions.feature_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "50.00",
            "cost_info": {
              "read_cost": "5.88",
              "eval_cost": "0.69",
              "prefix_cost": "18.11",
              "data_read_per_join": "276"
            },
            "used_columns": [
              "feature_id",
              "product_id",
              "variant_id",
              "value",
              "value_int",
              "lang_code"
            ],
            "attached_condition": "(`cscart_db`.`cscart_product_features_values`.`lang_code` = 'en')"
          }
        },
        {
          "table": {
            "table_name": "cscart_product_features",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "feature_id"
            ],
            "key_length": "3",
            "ref": [
              "cscart_db.cscart_product_features_descriptions.feature_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "1.73",
              "eval_cost": "0.69",
              "prefix_cost": "20.53",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "feature_id",
              "feature_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_product_feature_variants",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "variant_feature_idx",
              "idx_var_feat_pos"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id"
            ],
            "key_length": "3",
            "ref": [
              "cscart_db.cscart_product_features_values.variant_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "1.73",
              "eval_cost": "0.69",
              "prefix_cost": "22.96",
              "data_read_per_join": "7K"
            },
            "used_columns": [
              "variant_id"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_product_feature_variant_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "cscart_db.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "1.73",
              "eval_cost": "0.69",
              "prefix_cost": "25.38",
              "data_read_per_join": "51K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}

Result

feature_id feature_type name val
30 M Color Nude
31 C Express Delivery N
34 M Skin Type Normal Skin
37 S Ingredients list Aqua (Water), Cyclopentasiloxane, Apple extract, Trimethylsiloxysilicate, Isododacane, Dimethicone, Butylene Glycol, Kaolin, Cutcuma longa root oil,Octyldodecanol , Jojoba esters , Peg/Ppg-18/18 Dimethicone, Niacinamide, 3-O-ethyl Ascorbic ,Boron Nitride,
60 M kindcode Cruelty Free
61 M Formulation Liquid
62 E Brand Type Beauty
63 S Country of Origin India
65 M Key Ingredients Vitamin C,Niacinamide,Bakuchio
68 N Net Volume
69 T Expiry or Best Before Date 24
72 T How to Use Dot the concealer on a blemish, dark spot or a pigmented area. Use your fingers to tap the product into your skin with a circular motion for a more natural look. For more coverage and a full makeup look, you can also use a small flat brush to blend the pr
74 N Net Content
76 S Expiry or Best Before Month 24 Months
104 S Shade Vanilla
110 S Colour Nude
111 M Finish Matte
130 T Length 12
131 T Breadth 8
132 T Height 2.1
133 C Most Loved N
154 E Featured Ingredient Niacinamide,Vitamin C
155 C Test Promo Y
156 C Update image Y
157 N KLEEN Score
167 M Sale Identifier NOHALFPRICE2207