Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e85e4b0796c6b057c42d5c9f920f8df64958de98f2ff5a3f9bff84721aaa62e5' 
  AND token = 'GPv+76rkNR0A4M0ia+f9I0VysDAqvfsCBg463s6ynSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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