To success spend of OP_CSV, following requirements must meet:

• Transaction must be version 2.
• If relative lock-time flag detected in input's nSequence, then UTXO's block MTP must satisfy < chain's MTP.
• if block height detected in input's nSequence, then UTXO's block height must satisfy < chain's block height + 1.
• <expiry time> in redeem script must <= nSequence.