SELECT 
  lang.name, 
  IF(
    cscart_ult_language_values.value IS NULL, 
    lang.value, cscart_ult_language_values.value
  ) as value 
FROM 
  cscart_language_values lang 
  LEFT JOIN cscart_ult_language_values ON cscart_ult_language_values.name = lang.name 
  AND company_id = 1 
  AND cscart_ult_language_values.lang_code = lang.lang_code 
WHERE 
  lang.lang_code = 'en' 
  AND lang.name IN (
    'cannot_buy', 'no_products_selected', 
    'error_no_items_selected', 'delete_confirmation', 
    'text_required_group_product', 
    'save', 'close', 'notice', 'warning', 
    'error', 'text_are_you_sure_to_proceed', 
    'text_invalid_url', 'error_validator_email', 
    'error_validator_phone', 'error_validator_phone_mask', 
    'error_validator_phone_mask_with_phone', 
    'error_validator_phone_phone_number_with_country_selection', 
    'error_validator_integer', 'error_validator_multiple', 
    'error_validator_password', 'error_validator_required', 
    'error_validator_zipcode', 'error_validator_message', 
    'text_page_loading', 'error_ajax', 
    'text_changes_not_saved', 'text_data_changed', 
    'placing_order', 'order_was_not_placed', 
    'file_browser', 'browse', 'more', 
    'cookie_is_disabled', 'insert_image', 
    'image_url', 'loading', 'text_editing', 
    'save', 'cancel', 'cannot_buy', 'no_products_selected', 
    'error_no_items_selected', 'delete_confirmation', 
    'text_required_group_product', 
    'save', 'close', 'notice', 'warning', 
    'error', 'text_are_you_sure_to_proceed', 
    'text_invalid_url', 'error_validator_email', 
    'error_validator_phone', 'error_validator_phone_mask', 
    'error_validator_phone_mask_with_phone', 
    'error_validator_phone_phone_number_with_country_selection', 
    'error_validator_integer', 'error_validator_multiple', 
    'error_validator_password', 'error_validator_required', 
    'error_validator_zipcode', 'error_validator_message', 
    'text_page_loading', 'error_ajax', 
    'text_changes_not_saved', 'text_data_changed', 
    'placing_order', 'order_was_not_placed', 
    'file_browser', 'browse', 'more', 
    'cookie_is_disabled', 'insert_image', 
    'image_url', 'loading', 'text_editing', 
    'save', 'cancel'
  )

Query time 0.00091

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "81.07"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ult_language_values",
          "access_type": "system",
          "possible_keys": [
            "PRIMARY"
          ],
          "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": "408"
          },
          "used_columns": [
            "lang_code",
            "name",
            "value",
            "company_id"
          ]
        }
      },
      {
        "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": 38,
          "rows_produced_per_join": 33,
          "filtered": "100.00",
          "index_condition": "((`atulecarter_atul_demo5`.`lang`.`lang_code` = 'en') and (`atulecarter_atul_demo5`.`lang`.`name` in ('cannot_buy','no_products_selected','error_no_items_selected','delete_confirmation','text_required_group_product','save','close','notice','warning','error','text_are_you_sure_to_proceed','text_invalid_url','error_validator_email','error_validator_phone','error_validator_phone_mask','error_validator_phone_mask_with_phone','error_validator_phone_phone_number_with_country_selection','error_validator_integer','error_validator_multiple','error_validator_password','error_validator_required','error_validator_zipcode','error_validator_message','text_page_loading','error_ajax','text_changes_not_saved','text_data_changed','placing_order','order_was_not_placed','file_browser','browse','more','cookie_is_disabled','insert_image','image_url','loading','text_editing','save','cancel','cannot_buy','no_products_selected','error_no_items_selected','delete_confirmation','text_required_group_product','save','close','notice','warning','error','text_are_you_sure_to_proceed','text_invalid_url','error_validator_email','error_validator_phone','error_validator_phone_mask','error_validator_phone_mask_with_phone','error_validator_phone_phone_number_with_country_selection','error_validator_integer','error_validator_multiple','error_validator_password','error_validator_required','error_validator_zipcode','error_validator_message','text_page_loading','error_ajax','text_changes_not_saved','text_data_changed','placing_order','order_was_not_placed','file_browser','browse','more','cookie_is_disabled','insert_image','image_url','loading','text_editing','save','cancel')))",
          "cost_info": {
            "read_cost": "67.67",
            "eval_cost": "6.70",
            "prefix_cost": "81.07",
            "data_read_per_join": "13K"
          },
          "used_columns": [
            "lang_code",
            "name",
            "value"
          ]
        }
      }
    ]
  }
}

Result

name value
browse Browse...
cancel Cancel
cannot_buy You cannot buy the product with these option variants
close Close
cookie_is_disabled For a complete shopping experience, please <a href="https://www.wikihow.com/Enable-Cookies-in-Your-Internet-Web-Browser" target="_blank">set your browser to accept cookies</a>
delete_confirmation Are you sure you want to delete the selected items?
error Error
error_ajax Oops, something went wrong ([error]). Please try again.
error_no_items_selected No items selected! At least one check box must be selected to perform this action.
error_validator_email The email address in the <b>[field]</b> field is invalid.
error_validator_integer The value of the <b>[field]</b> field is invalid. It should be integer.
error_validator_message The value of the <b>[field]</b> field is invalid.
error_validator_multiple The <b>[field]</b> field does not contain the selected options.
error_validator_password The passwords in the <b>[field2]</b> and <b>[field]</b> fields do not match.
error_validator_phone The phone number in the <b>[field]</b> field is invalid. The correct format is +16175555555.
error_validator_phone_mask The phone number in the <b>[field]</b> field is invalid.
error_validator_phone_mask_with_phone The phone number <b>[phone]</b> is invalid.
error_validator_phone_phone_number_with_country_selection The phone number is invalid
error_validator_required The <b>[field]</b> field is mandatory.
error_validator_zipcode The ZIP / Postal code in the <b>[field]</b> field is incorrect. The correct format is [extra].
file_browser File browser
image_url Image URL
insert_image Insert image
loading Loading...
more More
notice Notice
no_products_selected No products selected
order_was_not_placed Order was not placed
placing_order Placing the order
save Save
text_are_you_sure_to_proceed Are you sure you want to proceed?
text_changes_not_saved Your changes have not been saved.
text_data_changed Your changes have not been saved.Press OK to continue, or Cancel to stay on the current page.
text_editing Text editing
text_invalid_url You have entered an invalid URL
text_page_loading Loading... Your request is being processed, please wait.
text_required_group_product Please select a product for the required group [group_name]
warning Warning