SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd4a8f22511ea71e1e4c6cca674295aa3bee96305f68d843556bfa2ac7f8154c' 
  AND token = 'bFg7zDNuhGW1zVMVxmfJSVdET+sySjcswbN/zxCfsek=' 
  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