Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denpasar to Marrakech as you normally would.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Denpasar Bali Ngurah Rai Airport to Marrakech Menara Airport flight would often be abbreviated as a DPS to RAK flight.