Booker made a pair of free throws with 3:17 left in overtime and Long Beach State never trailed again.
Jordan Gilliam's 3-pointer with 22 seconds left in regulation tied the game at 59-all and both teams missed their final shot attempts to send it into overtime.
Booker missed 11 of 14-shot attempts from the field but was perfect from the foul line and made 10 of the 49ers' (11-18, 5-8 Big West Conference) 18 free throws. Bryan Alberts added 16 points for Long Beach State.
Callum McRae led the Highlanders (9-19, 3-9) with 16 points and 10 rebounds, Gilliam scored 15 and Dikymbe Martin scored 14. The Highlanders made just 1 of 2 from the foul line and settled instead for 26 3-point attempts in which they converted eight.
Boston passes off backboard to Williams for dunk
B.J. Boston tees up Ziaire Williams for an off-the-backboard, alley-oop dunk.
Bronny drains transition 3-ball
B.J. Boston dishes to Bronny James Jr. who makes the open 3-pointer.
Buggs, Hawaii beat UC Santa Barbara 70-63
Drew Buggs scored 12 points and tied his career high with 12 assists, Zigmars Raimo and Justin Webster combined to score 16 of their 21 points in the second half, and Hawaii beat UC Santa Barbara 70-63 on Saturday night.