Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '0a45f4196d82b6ba02376171a5b1872c92060b51919a5bec86ceea1ba31968ca' 
  AND token = 'LnqpOfClqYoGy9/kMpaLLTiOG2UeFUkmapRd8TprM9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01462

JSON explain

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