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SELECT 
  ab__dotd.*, 
  ab__dotd_desc.h1, 
  ab__dotd_desc.page_title, 
  ab__dotd_desc.meta_description, 
  ab__dotd_desc.meta_keywords 
FROM 
  tmall_ab__dotd AS ab__dotd 
  LEFT JOIN tmall_ab__dotd_descriptions AS ab__dotd_desc ON ab__dotd.promotion_id = ab__dotd_desc.promotion_id 
  AND ab__dotd_desc.lang_code = 'en' 
WHERE 
  ab__dotd.promotion_id = 23

Query time 0.00834

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}