SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2606d98cb7e95cce8381e9ad32b93c68ae8aae38abc36fac45cd49c1cf6a118b' 
  AND token = 'l6hbrb+u1Dakm4S/qmS5B9cdaoX5L7KvYwjRojVzRUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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