Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef537ca230936661b216e9ed33b5ba25670bbd8d27caf9ca136302ac90428b1f' 
  AND token = 'JfOihW/rHnZjNTw9iGP6r2aNGIQYWR7xuDE6jvob7+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00156

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}