Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e257bb6b823f0eddb329804a2dbde1817d0a39b278f1e8112c4dc8ef6544368' 
  AND token = '/G9IEIOZ8qMVNGVITT9EVEwrozYmSZg2N4G2wzOjoPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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