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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '3f69f80bfa862a0a33d329b4a9517a9116df8c15d6437024323e0b9b4b966adb' 
  AND token = 'xoFyv5orfMhWpaRdoEfVw/pRMj9QofPMzz2fEyMbxDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01515

JSON explain

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