The Indian duo defeated Chong and Ng by 18-21, 21-16, 21-18. The Indian pair will now meet Malaysia's Chen Tang Jie and Toh Ee Wei in their Round of 32 encounter on Wednesday.
Prannoy, who faced a loss to Chinese Taipei's Chou Tien-chen by 21-18, 15-21, 8-21 in the round of 16 at the China Open, lost to Yohanes Saut Marcellyno of Indonesia by 21-18, 15-21, 16-21 in a match that lasted an hour and 11 minutes.
In this Badminton World Federation (BWF) Super 500 Tournament, the world number 16 is the top-rated Indian shuttler in the women's category and will compete against the world number 20 from Japan, Natsuki Nidaira in the first round
During his match, Shetty defeated Hong Kong's world number 41 shuttler Jason Gunawan in two straight games by 21-17, 21-17, securing his first win against him in three meetings.
Prannoy, the world number 10 shuttler, lost to Japan's Kodai Naraoka, the world number sixth by 21-19, 21-13 in two straight games in an hour, as per Olympics.com.
Sindhu earned her spot in the pre-quarters by defeating world No. 21 Line Hojmark Kjaersfeldt of Denmark 21-12, 22-20. Following the first-round victory in 44 minutes, Sindhu will face former Olympic champion and rival Carolina Marin of Spain in the second round.
The fifth-seed Prannoy is currently India's highest-ranked singles shuttler. But despite his status as world number nine, he will be starting in the qualifiers.
Players in the top 16 (up to two per country) of the men's and women's 'Race to Paris' Rankings, secured a spot for their national sides in Olympics. The qualifying period for the marquee multi-sport event started on May 1 last year and ended on April 28.
Sindhu was playing her first-round match when her opponent Yvonne Li from Germany retired in the first game itself. Sindhu was leading 21-10 and won the match by walkover.