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 = 'ja' 
WHERE 
  cscart_product_feature_variants.variant_id IN (
    66, 69, 55, 84, 78, 76, 73, 46, 49, 52, 58, 
    39, 80, 70, 71, 67, 68, 83, 77, 74, 59, 
    61, 63, 53, 56, 41, 51, 65, 44, 82, 45, 
    75, 81, 79, 72, 54, 47, 48, 50, 60, 62, 
    64, 89, 106, 86, 101, 87, 102, 103, 100, 
    104, 108, 109, 119, 118, 110, 133, 134, 
    125, 111, 120, 124, 122, 123, 112, 121, 
    114, 115, 129, 117, 130, 127, 126, 128, 
    132, 105, 116, 107, 96, 90, 113, 95, 88, 
    97, 93, 98, 99, 92, 94, 131, 91, 135, 136, 
    1195, 1194, 1193, 1201, 1200, 1199
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00118

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "cscart_product_feature_variants.position, cscart_product_feature_variant_descriptions.variant",
      "temporary_table": {
        "table": {
          "table_name": "cscart_product_feature_variants",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "rows": 158,
          "filtered": 62.65822601,
          "attached_condition": "cscart_product_feature_variants.variant_id in (66,69,55,84,78,76,73,46,49,52,58,39,80,70,71,67,68,83,77,74,59,61,63,53,56,41,51,65,44,82,45,75,81,79,72,54,47,48,50,60,62,64,89,106,86,101,87,102,103,100,104,108,109,119,118,110,133,134,125,111,120,124,122,123,112,121,114,115,129,117,130,127,126,128,132,105,116,107,96,90,113,95,88,97,93,98,99,92,94,131,91,135,136,1195,1194,1193,1201,1200,1199)"
        },
        "table": {
          "table_name": "cscart_product_feature_variant_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["variant_id", "lang_code"],
          "ref": [
            "smscrm_edev.cscart_product_feature_variants.variant_id",
            "const"
          ],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_product_feature_variant_descriptions.lang_code = 'ja')"
        }
      }
    }
  }
}