SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c8122b0ca165f3da9e002292423fc6df7326ee260c073c46c1b9700dc7f734d' 
  AND token = 'UJVa8rTVwwR0Qyy/9lsflN/16VZj1vrQ+A2YNb3Dp08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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