SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcedf23ccedbce63095164f0915128066b26af37a9a48d224f203e46ea59b606' 
  AND token = '/HOwvYAuDUFCOwH2Si/NRm4igRyPSq/6qEdZ+in3Uys=' 
  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