SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '580be565a0ba690f7f5b5ae9cb9fb06ed7b0a32ce002864ca082f448c959ea80' 
  AND token = 'mRf/AvpaJfUokHuZ1vzc+YaeDA7cUgE33Q4LjiuyvGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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