Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdc791b574baa65097761ec37f8cd089993dc8d2090bb135e1f55b8aaf28e24b' 
  AND token = 'C2NInnq44LdZk0lCd6gYdszgRPITA6jEO9tzVlwEcMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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