SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22490190f99337f491bda34ebe221b9f7e57427de58a2ee8ca8bbefc8879382d' 
  AND token = 'QAfFY59Yqccm9bYJyaVHtfq6QrqTLcA9DbXTw8xAjn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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