Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9af9e5522adf816ebb3a5f1dbb4a755a5b172b910a46962a411c6520a5227686' 
  AND token = 'c/dS7jp2ZYfF2GovbojyIDCWjQ7G0hejw53/rUfpZe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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