Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a242d783205f8e61464aa6b20922f1cadc4b62a316332381c0615b833ebb89d' 
  AND token = 'Kuda4Vxp0bYXTk1TAZqoJ81HJrdgwht99zHRa0yEirg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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