SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '329d911c80e0737efd51e7968782f7d06cc17a04038b5d269677505485606655' 
  AND token = 'NN3XVjo6laK9wO5YRrCI6MM+w1zq+T0jZFoZkW/f/JA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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