SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e95dd1152b31f8ddedb4dd4b52f23313db5bef8d1053ee730da3da6803de47c' 
  AND token = 'C9KyYj+Nk2CGAQGXQXc7x4xrbX5u+cG8pt4tWq26aIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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