Yes, that is correct. If an object has a constant velocity, it means that its speed and direction of motion are both constant over time. According to Newton's first law of motion, an object will remain in a state of constant velocity (which includes being at rest) unless acted upon by an external force. Therefore, if an object is moving with constant velocity, it implies that there is no net external force acting on it.
In other words, if there were a net external force acting on the object, it would cause a change in the object's velocity, either by speeding it up, slowing it down, or changing its direction. So, the absence of a net external force is a necessary condition for an object to maintain a constant velocity.