SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33abb9f4ecca6757fd4134489760dbff0f61bb0a82078a24924095a1d74863bc' 
  AND token = 'mBndiCpOTtqqLw7rqKFDUoxJGX4RxpWH8zuwxhPkUCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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