SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '968201447f9f976410c143ce1e3f36d8ccbb7503db76f9620830017162a10d16' 
  AND token = 'mGe93mywlsMN/ptrVcwU187hrjNfTkZ1pIBx6VU7owI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables