Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '042cbf928561d4f2870414061faa6f83b2153992c4c4e954e7768880cd0670b1' 
  AND token = 'XxrMiF0VJJxRf00GpAfps9UrRUn5yttdNerS6otEVXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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