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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '3593a251d0399eee85efeea9892892b567626425a9215492159e1bbe1f1e871d' 
  AND token = 'OnASGvmRcydomZf46bM7rQgZxIHrv30sjGD+xp4DOOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01495

JSON explain

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