SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '560e85e15f88603ffb5311def3d6c377de14bbf80150cba1ea48fe4926c25d0c' 
  AND token = 'EOY9PdO+5dANBm87hTayLEuUjO1kKMJsPxcN0eK6TWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

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