yesterday evening I send out 0.97 BTC. I checked transaction and It says : " lock time 459355" are my coins lost ? please help 

It says Lock Time: 459355 

and still unconfirmed since yesterday
No, your coins are not lost. Either they get confirmed and become available to the recipient, or they are unspent and remain yours.

All transactions created with Bitcoin Core (and maybe also other wallets) set their transaction to be confirmed only with the next block at the earliest. This is done to discourage fee-sniping.

In your case I assume that the current block was 459354, so the transaction was created locked to the next block 459355. Since we're currently at block 459475, the delay of confirmation for your transaction would not be related to the locktime.

For more information please see Why is my transaction not getting confirmed and what can I do about it?.