Your chances of securing an MBBS seat in Haryana depend on several factors:

1. All India Rank (AIR) : Your AIR of 627 is competitive, which is positive for admissions.

2. OBC Rank : Your OBC rank of 53425 is also considered in the reservation category for admissions.

3. State Quota and Cutoffs : Each state, including Haryana, has its own cutoff ranks for MBBS admissions. Check the previous year's cutoffs to estimate your chances.

4. Counseling and Seat Allotment : Attend counseling sessions and keep all required documents ready. Your seat allotment will depend on your ranks and availability of seats.

5. Merit List and Preferences : Make sure to prioritize your choices based on your rank and preferences during counseling.

Consult with the counseling authorities for the most accurate information regarding your chances and procedures for MBBS admissions in Haryana.