Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1fe49200c0d932b3cb82e0400b6ea4c5a879d49d4836aaeeb93a2ee3318fe0a8' 
  AND token = '4zXkvmmVGjoYrsOdFWp1yUO8EKlnF8pGcr9Y8mLfJ5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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