Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99319ca38233506f66b37cdd51e72a669f1a2ebb06e6fab2bd6258c0af8ee85f' 
  AND token = 'PnrpKzDPSr/qfIfjlNZ5z2egxti4EKam+OA/TWdRCL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}