SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4711d2da4a04e3fe322abce43eb34bc0f43e13be857ac866cd575d0d436aa727' 
  AND token = 'WJqc4IM8JUq5Ap3c8mE7OowGm98egNPSXnXrX/ijhb0=' 
  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