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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 = 2 
  AND cscart_ult_language_values.lang_code = lang.lang_code 
WHERE 
  lang.lang_code = 'en' 
  AND lang.name IN (
    'google_analytics.google_analytics_cookies_title', 
    'google_analytics.google_analytics_cookies_description', 
    'google_analytics.google_ads_cookies_title', 
    'google_analytics.google_ads_cookies_description', 
    'google_analytics.google_analytics_cookies_title', 
    'google_analytics.google_analytics_cookies_description', 
    'google_analytics.google_ads_cookies_title', 
    'google_analytics.google_ads_cookies_description'
  )

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "lang",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "392",
      "used_key_parts": ["lang_code", "name"],
      "rows": 4,
      "filtered": 100,
      "index_condition": "lang.lang_code = 'en' and lang.`name` in ('google_analytics.google_analytics_cookies_title','google_analytics.google_analytics_cookies_description','google_analytics.google_ads_cookies_title','google_analytics.google_ads_cookies_description','google_analytics.google_analytics_cookies_title','google_analytics.google_analytics_cookies_description','google_analytics.google_ads_cookies_title','google_analytics.google_ads_cookies_description')"
    },
    "table": {
      "table_name": "cscart_ult_language_values",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "396",
      "used_key_parts": ["lang_code", "name", "company_id"],
      "ref": [
        "cscart_purchase_fl_com.lang.lang_code",
        "cscart_purchase_fl_com.lang.name",
        "const"
      ],
      "rows": 1,
      "filtered": 100
    }
  }
}

Result

name	value
google_analytics.google_ads_cookies_description	Google Ads is a service that allows us to make personalized offers for you. This permission allows us to set cookies and send some of your data related to advertising to Google. Here is <a href="https://safety.google/privacy/ads-and-data/" target="_blank">how Google handles ad-related data</a>.
google_analytics.google_ads_cookies_title	Google Ads
google_analytics.google_analytics_cookies_description	Google Analytics is a service that provides us with website analytics: the number of unique visitors, the most and least popular pages, etc. Here is <a href="https://support.google.com/analytics/answer/6004245" target="_blank">Google Analytics statement on privacy</a>.
google_analytics.google_analytics_cookies_title	Google Analytics