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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '8ce00a77780f9f44b444fee919a552e21ecb27776180b6b0a07af8d049e2fa94' 
  AND token = 'RNUYSkyDQa3mheux51ykM6sCQm0zG2kFVwmT92LRcTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01046

JSON explain

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