SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cc2e7658b2b8e775f8ac85b52ef5df36064bb52bea7d666437d0c281e9b903b' 
  AND token = '/Beu1xaGuxGldl2CPxLChrB/r5l7GHr7xA1guKWw5tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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