Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6c7ac83dfbce1bf2cbdc1f254fc07b5f9cb127645cff76203fc598047b00203' 
  AND token = 'adORn07rM9jGBlPpcYDaaFaaB+EEbRNx6DnPkfFxP7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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