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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 (
    214, 350, 408, 466, 1500, 1551, 1602, 
    1706, 1737, 1768, 1708, 1739, 1770, 
    3878, 3880, 3882, 1388, 1417, 1446, 
    1396, 1425, 1454, 1405, 1434, 1463, 
    2703, 2725, 2747, 2707, 2729, 2751, 
    2708, 2730, 2752, 2710, 2732, 2754
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00138

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "164.41"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "49.00"
      },
      "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": 49,
            "rows_produced_per_join": 49,
            "filtered": "100.00",
            "index_condition": "((`eshopuga_upgr_4122`.`a`.`option_id` in (214,350,408,466,1500,1551,1602,1706,1737,1768,1708,1739,1770,3878,3880,3882,1388,1417,1446,1396,1425,1454,1405,1434,1463,2703,2725,2747,2707,2729,2751,2708,2730,2752,2710,2732,2754)) and (`eshopuga_upgr_4122`.`a`.`status` = 'A'))",
            "cost_info": {
              "read_cost": "95.81",
              "eval_cost": "9.80",
              "prefix_cost": "105.61",
              "data_read_per_join": "2K"
            },
            "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": 49,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "9.80",
              "prefix_cost": "115.41",
              "data_read_per_join": "37K"
            },
            "used_columns": [
              "variant_id",
              "lang_code",
              "variant_name"
            ]
          }
        }
      ]
    }
  }
}

Result

variant_id	option_id	position	modifier	modifier_type	weight_modifier_type	point_modifier_type
778	350	0	0.000	A	A	A
894	408	0	0.000	A	A	A
1540	1417	0	0.000	A	A	A
1556	1425	0	0.000	A	A	A
1574	1434	0	0.000	A	A	A
1648	1551	0	0.000	A	A	A
1772	1737	0	0.000	A	A	A
1776	1739	0	0.000	A	A	A
2418	2725	0	0.000	A	A	A
2426	2729	0	0.000	A	A	A
2428	2730	0	0.000	A	A	A
2432	2732	0	0.000	A	A	A
3250	3880	0	0.000	A	A	A
777	350	1	9.000	A	A	A
893	408	1	2.000	A	A	A
1539	1417	1	2.000	A	A	A
1555	1425	1	2.000	A	A	A
1573	1434	1	2.000	A	A	A
1647	1551	1	2.000	A	A	A
1771	1737	1	2.000	A	A	A
1775	1739	1	2.000	A	A	A
2417	2725	1	2.000	A	A	A
2425	2729	1	2.000	A	A	A
2427	2730	1	2.000	A	A	A
2431	2732	1	2.000	A	A	A
3249	3880	1	2.000	A	A	A