Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9364d4e3cd151fccb56e8d9739bb30ee7ae0123c588126eb26844aa5c8d908b9' 
  AND token = 'GmzpfoCkHNWlEiV7nBQ7DeZIDh3U83BnJk0ZoEcYfOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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