Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b7d1f968b0b3ae09d2b842630ccedcb9be9a68ab1fb872277974effe3d65c33' 
  AND token = '420ZY8ChwQGUwdQKeCkYS8W2x01F41ZU0uriRv3JAk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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