Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '27ad0e5b6dd1c1b756371005b16d6c9221d9dee65f9a8c468d58f308e7b477fa' 
  AND token = 'VoJgwXJvkvdhDU2aXltOCLUyoTp8Q51XZqvq2iC8094=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}