SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61ce6a290abaf78ed70996c711e47c112c9c38587f9fcaa6d9d0c47a5698ca4d' 
  AND token = 'T+AXG6pitAy42WyZSUyFD/drO+xHOnB/MyQcc9jg99g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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