SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'ru' 
  AND lang.name IN (
    'sku', 'select_options', 'old_price', 
    'list_price', 'enter_your_price', 
    'contact_us_for_price', 'sign_in_to_view_price', 
    'inc_tax', 'including_tax', 'you_save', 
    'you_save', 'save_discount', 'free_shipping', 
    'save_discount', 'save_discount', 
    'availability', 'on_backorder', 
    'in_stock', 'availability', 'in_stock', 
    'on_backorder', 'availability', 
    'quantity', 'text_edp_product', 
    'sku', 'select_options', 'old_price', 
    'list_price', 'enter_your_price', 
    'contact_us_for_price', 'sign_in_to_view_price', 
    'inc_tax', 'including_tax', 'you_save', 
    'you_save', 'save_discount', 'free_shipping', 
    'save_discount', 'save_discount', 
    'availability', 'on_backorder', 
    'in_stock', 'availability', 'in_stock', 
    'on_backorder', 'availability', 
    'quantity', 'text_edp_product'
  )

Query time 0.00063

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "15.45"
    },
    "table": {
      "table_name": "lang",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "lang_code",
        "name"
      ],
      "key_length": "392",
      "rows_examined_per_scan": 17,
      "rows_produced_per_join": 17,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "13.75",
        "eval_cost": "1.70",
        "prefix_cost": "15.45",
        "data_read_per_join": "6K"
      },
      "used_columns": [
        "lang_code",
        "name",
        "value"
      ],
      "attached_condition": "((`dev2`.`lang`.`lang_code` = 'ru') and (`dev2`.`lang`.`name` in ('sku','select_options','old_price','list_price','enter_your_price','contact_us_for_price','sign_in_to_view_price','inc_tax','including_tax','you_save','you_save','save_discount','free_shipping','save_discount','save_discount','availability','on_backorder','in_stock','availability','in_stock','on_backorder','availability','quantity','text_edp_product','sku','select_options','old_price','list_price','enter_your_price','contact_us_for_price','sign_in_to_view_price','inc_tax','including_tax','you_save','you_save','save_discount','free_shipping','save_discount','save_discount','availability','on_backorder','in_stock','availability','in_stock','on_backorder','availability','quantity','text_edp_product')))"
    }
  }
}