According to the theory of relativity, specifically the theory of special relativity, the speed of light in a vacuum is the maximum speed at which information or causal influence can travel. From the perspective of a photon, which travels at the speed of light, time does not pass. This phenomenon is known as time dilation.
From the reference frame of a photon, its travel time would indeed be perceived as instantaneous. However, it's important to note that this is a hypothetical scenario since photons are elementary particles and do not possess consciousness or the ability to perceive time.
Regarding your second question, photons are not created and destroyed at the same instant. When photons are created, such as in the emission of light from a source, they exist as long as they propagate through space until they are absorbed or interact with another particle or medium. This interaction can cause the photon to be absorbed, scattered, or undergo other processes, thereby changing its state or ceasing to exist as a distinct particle.
In summary, although photons travel at the speed of light and do not experience time, they still exist as long as they are propagating through space until they interact with something else. Their creation and destruction processes occur within the framework of time experienced by external observers.