Maya and living entities are different energies of Krishna and all of them are eternal. Maya is acting under the direction of Krishna but her task is to punish the revolted living entities; therefore, she has to business in the spiritual platform. Maya cannot go to Krishna means that Maya's influence cannot be active in the presence of Krishna. The example of darkness can be given herein. The darkness has no existence in the presence of sunlight, similarly Maya cannot exist in the presence of Krishna. As darkness and light exist eternally, similarly, Maya and Krishna exist eternally, but Maya has no existence in the presence of Krishna. Try to understand this simile.