A minute or two do not have an effect on the rulings of prayer as the timing of prayer is based on an approximation. The Angel Jibril came to the Prophet to give an approximate time for each prayer, rather than an exact time. Therefore, scholars have determined the prayer times based on the position of the sun, twilight, darkness of night, and daylight, as well as other signs indicated by the evidence.
However, the five-minute difference can be significant in terms of changes in the sky, movement of the sun, and daylight.
Therefore, it is not permissible to perform the prayer before its designated time by this amount of time.
Fatwa by Dr. Khālid Naṣr