SELECT 
  pfv.variant_id, 
  pfv.position, 
  pfvd.variant 
FROM 
  cscart_product_feature_variants AS pfv 
  INNER JOIN cscart_product_feature_variant_descriptions AS pfvd ON pfv.variant_id = pfvd.variant_id 
  AND pfvd.lang_code = 'en' 
WHERE 
  pfv.variant_id IN (
    1553, 1563, 1562, 1555, 1554, 1564, 1552, 
    1560, 1561, 1559, 1659, 1558, 1556, 
    1557, 1660, 1587, 1751, 1750, 1526, 
    1748, 1749, 1684, 1687, 1766, 1682, 
    1591, 1773, 1775, 1776, 1774, 1778, 
    1755, 1779, 1780, 1781, 1782, 1785, 
    1786, 1760, 1787, 1788, 1789, 1641, 
    1653, 2907, 2908, 2910, 2870, 1596, 
    1600, 2758, 1607, 1609, 1761, 1762, 
    7521, 7064, 1784, 7534, 7535, 1606, 
    2243, 2443, 1565, 1595
  )

Query time 0.00176

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "68.26"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "pfv",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 65,
          "rows_produced_per_join": 65,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`pfv`.`variant_id` in (1553,1563,1562,1555,1554,1564,1552,1560,1561,1559,1659,1558,1556,1557,1660,1587,1751,1750,1526,1748,1749,1684,1687,1766,1682,1591,1773,1775,1776,1774,1778,1755,1779,1780,1781,1782,1785,1786,1760,1787,1788,1789,1641,1653,2907,2908,2910,2870,1596,1600,2758,1607,1609,1761,1762,7521,7064,1784,7534,7535,1606,2243,2443,1565,1595))",
          "cost_info": {
            "read_cost": "39.01",
            "eval_cost": "6.50",
            "prefix_cost": "45.51",
            "data_read_per_join": "74K"
          },
          "used_columns": [
            "variant_id",
            "position"
          ]
        }
      },
      {
        "table": {
          "table_name": "pfvd",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id",
            "lang_code"
          ],
          "key_length": "9",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.pfv.variant_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 65,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "16.25",
            "eval_cost": "6.50",
            "prefix_cost": "68.26",
            "data_read_per_join": "196K"
          },
          "used_columns": [
            "variant_id",
            "variant",
            "lang_code"
          ]
        }
      }
    ]
  }
}