Sandbox

SELECT 
  b.variant_name, 
  a.* 
FROM 
  cscart_product_option_variants AS a 
  LEFT JOIN cscart_product_option_variants_descriptions AS b ON b.variant_id = a.variant_id 
  AND b.lang_code = 'en' 
WHERE 
  1 
  AND a.option_id IN (525, 526, 530) 
  AND a.status = 'A' 
ORDER BY 
  a.position, 
  a.variant_id

Query time 0.00087

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "27.76"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "15.00"
      },
      "nested_loop": [
        {
          "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": 15,
            "rows_produced_per_join": 15,
            "filtered": "100.00",
            "index_condition": "((`cscartdb`.`a`.`option_id` in (525,526,530)) and (`cscartdb`.`a`.`status` = 'A'))",
            "cost_info": {
              "read_cost": "6.01",
              "eval_cost": "1.50",
              "prefix_cost": "7.51",
              "data_read_per_join": "720"
            },
            "used_columns": [
              "variant_id",
              "option_id",
              "position",
              "modifier",
              "modifier_type",
              "weight_modifier",
              "weight_modifier_type",
              "point_modifier",
              "point_modifier_type",
              "status",
              "note_required"
            ]
          }
        },
        {
          "table": {
            "table_name": "b",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "cscartdb.a.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 15,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "3.75",
              "eval_cost": "1.50",
              "prefix_cost": "12.76",
              "data_read_per_join": "11K"
            },
            "used_columns": [
              "variant_id",
              "lang_code",
              "variant_name"
            ]
          }
        }
      ]
    }
  }
}

Result

variant_name	variant_id	option_id	position	modifier_type	weight_modifier_type	point_modifier_type	status
XS	13208	525	1	A	A	A	A
White Picot	13234	526	1	A	A	A	A
Pink	13243	530	1	A	A	A	A
Small	13209	525	2	A	A	A	A
Black Picot	13235	526	2	A	A	A	A
White	13244	530	2	A	A	A	A
Medium	13210	525	3	A	A	A	A
White Loop	13236	526	3	A	A	A	A
Black	13245	530	3	A	A	A	A
Large	13211	525	4	A	A	A	A
Black Loop	13237	526	4	A	A	A	A
Red	13246	530	4	A	A	A	A
XL	13212	525	5	A	A	A	A
Blue Loop	13238	526	5	A	A	A	A
Lilac	13247	530	5	A	A	A	A
XXL	13213	525	6	A	A	A	A
Pink Frilly	13239	526	6	A	A	A	A
No Bow	13248	530	6	A	A	A	A
XXXL	13214	525	7	A	A	A	A