SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a7658e38c68410f85857fb7b4e72a764becfbbd39f124f884471f29ad670f8b' 
  AND token = 'cSDTMzPQsc4rvrOMKXSpige4/E26fLC+e+aSBdnjvsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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