SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71022e3851636eb6a29ebadacf17affb4796f8cc62e72ba62c12f71a630970d0' 
  AND token = '9wu8nWzb1z7lGaQHo+FyJ8J+9AjfhxPRyRC2JH2KnUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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