SELECT 
  cscart_product_feature_variants.variant_id, 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variants.color, 
  cscart_product_feature_variant_descriptions.variant 
FROM 
  cscart_product_feature_variants 
  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' 
WHERE 
  cscart_product_feature_variants.variant_id IN (
    1288, 
    1933, 
    1935, 
    2378, 
    1712, 
    2416, 
    1954, 
    1836, 
    1660, 
    2402, 
    2407, 
    2424, 
    2422, 
    2428, 
    1202, 
    1999, 
    1973, 
    1931, 
    1659, 
    1912, 
    1904, 
    2366, 
    1900, 
    2367, 
    1905, 
    1789, 
    1787, 
    1899, 
    2075, 
    1748, 
    2000, 
    1995, 
    1902, 
    2108, 
    2182, 
    1389, 
    1235, 
    2290, 
    2439, 
    2556, 
    2499, 
    2557, 
    1245, 
    1881, 
    2333, 
    1988, 
    2359, 
    1941, 
    1867, 
    2354, 
    1972, 
    2340, 
    2355, 
    2361, 
    2363, 
    2357, 
    2365, 
    2335, 
    2360, 
    2358, 
    1984, 
    1996, 
    1930, 
    1545, 
    2268, 
    1994, 
    1234, 
    2353, 
    2558, 
    2451, 
    1462, 
    2560, 
    2561, 
    2562, 
    2417, 
    2538, 
    2537, 
    2539, 
    2496, 
    2500, 
    2502, 
    2505, 
    2506, 
    2507, 
    2509, 
    2510, 
    2512, 
    2514, 
    2516, 
    2520, 
    2523, 
    2525, 
    2526, 
    2527, 
    2528, 
    2529, 
    2530, 
    2531, 
    2532, 
    2533, 
    2534, 
    2535, 
    1254, 
    2566, 
    2567, 
    1241, 
    1251, 
    1797, 
    1690, 
    1861, 
    2412, 
    2432, 
    2442, 
    2455, 
    2457, 
    2461, 
    2470, 
    2483, 
    2484, 
    2491, 
    2494, 
    2495, 
    2540, 
    2542, 
    2543, 
    2544, 
    2545, 
    2546, 
    2547, 
    2548, 
    2550, 
    2551, 
    2552, 
    2553, 
    2554, 
    2555
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00162

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "142.81"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_feature_variants",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 136,
            "rows_produced_per_join": 136,
            "filtered": "100.00",
            "index_condition": "(`test2_gaseus`.`cscart_product_feature_variants`.`variant_id` in (1288,1933,1935,2378,1712,2416,1954,1836,1660,2402,2407,2424,2422,2428,1202,1999,1973,1931,1659,1912,1904,2366,1900,2367,1905,1789,1787,1899,2075,1748,2000,1995,1902,2108,2182,1389,1235,2290,2439,2556,2499,2557,1245,1881,2333,1988,2359,1941,1867,2354,1972,2340,2355,2361,2363,2357,2365,2335,2360,2358,1984,1996,1930,1545,2268,1994,1234,2353,2558,2451,1462,2560,2561,2562,2417,2538,2537,2539,2496,2500,2502,2505,2506,2507,2509,2510,2512,2514,2516,2520,2523,2525,2526,2527,2528,2529,2530,2531,2532,2533,2534,2535,1254,2566,2567,1241,1251,1797,1690,1861,2412,2432,2442,2455,2457,2461,2470,2483,2484,2491,2494,2495,2540,2542,2543,2544,2545,2546,2547,2548,2550,2551,2552,2553,2554,2555))",
            "cost_info": {
              "read_cost": "81.61",
              "eval_cost": "13.60",
              "prefix_cost": "95.21",
              "data_read_per_join": "155K"
            },
            "used_columns": [
              "variant_id",
              "color",
              "position"
            ]
          }
        },
        {
          "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": [
              "test2_gaseus.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 136,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "34.00",
              "eval_cost": "13.60",
              "prefix_cost": "142.81",
              "data_read_per_join": "423K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}