SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94ea7d0698a267756df670dc0832757f811578911c06f553c1a5c7beb60f71b1' 
  AND token = '9sYe1QaOubLJjHup6UfTZ44SarEVFkqvGferRlCP+TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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