Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09de511baab511d39476620dfd67835892bee0dd4efb5e03e3bfc9d314d566ac' 
  AND token = 'ejWdr+OcaCwKWUPG0lNjpgmkNWdajIFhhGRsKlgxs3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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