SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd67cb4c4feda0c40fec39e5890d1754d7d96194fc39b7fea9b86fe3c3322bf80' 
  AND token = 'ByU0U43LwQPGMYRPvQ5jdMvWL7GTmKtET16nbDAzRjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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