Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29fecd6d0781591170796a7acfb6843fbbf4ff47f193b876b08175281bf4b75a' 
  AND token = 'XgdpEv4n+wH42OlQTk97ncz8MO/CI0WvxMhG1sZlh1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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