The things you describe sound very familiar, though I do not get these with LSD but by simple exercise of thought, some good parties, music, being in nature. The brain enters a stage of flow, yada yada. For everyone the way to reach this state of mind is different, harder for some then for others. Meditation, drugs, having a great partner, a good conversation or even just a good night of sleep, many roads are leading to Rome. Personally I cherish my ability to fairly easily achieve such a state enough to want to risk my delicate chemical balance with drugs, although easily available here.
The hard problem of consciousness seems like an even more intractable issue than the fundamental problems of physics. How something like consciousness can emerge from matter.
Consciousness seems to be an emergent feature of matter, similar to temperature and actually time itself. It explains why you are more prone to simple diseases when feeling unhappy, your consciousness just being a representation of the state of your brain. A few simple rules in a larger environment seem to commonly lead to emergent features. Quantitzation of energy packets leads to the Sun being able to exist for 9 billion years, it leads to rainbows and the rates of radioactivity as they are. Consciousness seems to be just one more of these emergent features that in itself are nothign special. Quite frankly if you dive far enough into elementary physics with an open mind I don't think you would make the same statement ever again. The Universe is fascinating and its fundamentals also really, really weird.