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SELECT 
  a.variant_id, 
  a.option_id, 
  a.position, 
  a.modifier, 
  a.modifier_type, 
  a.weight_modifier, 
  a.weight_modifier_type, 
  a.point_modifier, 
  a.point_modifier_type, 
  b.variant_name, 
  IF(
    shared_option_variants.variant_id IS NOT NULL, 
    shared_option_variants.modifier, 
    a.modifier
  ) as modifier, 
  IF(
    shared_option_variants.variant_id IS NOT NULL, 
    shared_option_variants.modifier_type, 
    a.modifier_type
  ) as modifier_type 
FROM 
  cscart_product_option_variants as a 
  LEFT JOIN cscart_product_option_variants_descriptions as b ON a.variant_id = b.variant_id 
  AND b.lang_code = 'it' 
  LEFT JOIN cscart_ult_product_option_variants shared_option_variants ON shared_option_variants.variant_id = a.variant_id 
  AND shared_option_variants.company_id = 1 
WHERE 
  a.option_id IN (
    1630, 1651, 1672, 1499, 1550, 1601, 1704, 
    1735, 1766, 1706, 1737, 1768, 1709, 
    1740, 1771, 1483, 1534, 1585, 1411, 
    1440, 1469, 1696, 1727, 1758, 2707, 
    2729, 2751, 3970, 3988, 4006
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00124

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "126.21"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "37.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "shared_option_variants",
            "access_type": "system",
            "possible_keys": [
              "PRIMARY",
              "company_id"
            ],
            "rows_examined_per_scan": 0,
            "rows_produced_per_join": 1,
            "filtered": "0.00",
            "const_row_not_found": true,
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.20",
              "prefix_cost": "0.00",
              "data_read_per_join": "24"
            },
            "used_columns": [
              "variant_id",
              "company_id",
              "modifier",
              "modifier_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "a",
            "access_type": "range",
            "possible_keys": [
              "status",
              "option_id",
              "option_id_2"
            ],
            "key": "option_id",
            "used_key_parts": [
              "option_id",
              "status"
            ],
            "key_length": "6",
            "rows_examined_per_scan": 37,
            "rows_produced_per_join": 37,
            "filtered": "100.00",
            "index_condition": "((`eshopuga_upgr_4122`.`a`.`option_id` in (1630,1651,1672,1499,1550,1601,1704,1735,1766,1706,1737,1768,1709,1740,1771,1483,1534,1585,1411,1440,1469,1696,1727,1758,2707,2729,2751,3970,3988,4006)) and (`eshopuga_upgr_4122`.`a`.`status` = 'A'))",
            "cost_info": {
              "read_cost": "74.41",
              "eval_cost": "7.40",
              "prefix_cost": "81.81",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "variant_id",
              "option_id",
              "position",
              "modifier",
              "modifier_type",
              "weight_modifier",
              "weight_modifier_type",
              "point_modifier",
              "point_modifier_type",
              "status"
            ]
          }
        },
        {
          "table": {
            "table_name": "b",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "eshopuga_upgr_4122.a.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 37,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "7.40",
              "prefix_cost": "89.21",
              "data_read_per_join": "28K"
            },
            "used_columns": [
              "variant_id",
              "lang_code",
              "variant_name"
            ]
          }
        }
      ]
    }
  }
}

Result

variant_id	option_id	position	modifier	modifier_type	weight_modifier_type	point_modifier_type
1586	1440	0	0.000	A	A	A
1614	1534	0	0.000	A	A	A
1646	1550	0	0.000	A	A	A
1704	1651	0	0.000	A	A	A
1752	1727	0	0.000	A	A	A
1768	1735	0	0.000	A	A	A
1772	1737	0	0.000	A	A	A
1778	1740	0	0.000	A	A	A
2426	2729	0	0.000	A	A	A
3325	3988	0	0.000	A	A	A
1585	1440	1	2.000	A	A	A
1613	1534	1	2.000	A	A	A
1645	1550	1	2.000	A	A	A
1703	1651	1	2.000	A	A	A
1751	1727	1	2.000	A	A	A
1767	1735	1	2.000	A	A	A
1771	1737	1	2.000	A	A	A
1777	1740	1	2.000	A	A	A
2425	2729	1	2.000	A	A	A
3324	3988	1	2.000	A	A	A