Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '968bfca2188db1508f33a0872f9bde03a19dee43a96294bc1deb1ae1a2e71e38' 
  AND token = '9GoeQsw6zqkWiXxJxvrnsfr9jkMIwbB92Hv0xoZZx2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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