SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c05a6c49e857cd9f08d45085901b52805d71da2481169bb1875c3371b95415fe' 
  AND token = 'TlzvfHCcDjx+XITg90Q16RAnorWD0ap6dseGXaYB+O8=' 
  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