SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'en' 
  AND lang.name IN (
    'no_products_selected', 'all_features', 
    'all_features', 'similar_only', 
    'similar_only', 'different_only', 
    'different_only', 'clear_list', 
    'add_feature', 'add', 'compare', 
    'no_products_selected', 'all_features', 
    'all_features', 'similar_only', 
    'similar_only', 'different_only', 
    'different_only', 'clear_list', 
    'add_feature', 'add', 'compare'
  )

Query time 0.01803

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "lang",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "392",
          "used_key_parts": ["lang_code", "name"],
          "rows": 8,
          "filtered": 100,
          "index_condition": "lang.lang_code = 'en' and lang.`name` in ('no_products_selected','all_features','all_features','similar_only','similar_only','different_only','different_only','clear_list','add_feature','add','compare','no_products_selected','all_features','all_features','similar_only','similar_only','different_only','different_only','clear_list','add_feature','add','compare')"
        }
      }
    ]
  }
}