Jordon Varnado, who had 18 points, hit a 3-pointer with 48 seconds left to pull Troyin with 61-58. Little Rock made 4 of 6 free throws to secure the win.
A late 3 from Kelton Ford made Troy (5-8, 0-2 Sun Belt) just the third team to surpass 60 against Little Rock (12-1, 2-0).
Jackson had 16 points in the second half for Little Rock (12-1, 2-0 Sun Belt) and shot 8 of 11 from the field. Johnson had four 3s and made 8 of 9 free throws.
Little Rock shot 54.5 percent in the second half (12 of 22).
Troy led 34-29 at the half against the team that leads in the nation in scoring defense (55.2) but only shot 26 percent (6 of 23) in the second half.