Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba985a479bbb15f9c302c89f89fe924dacd5620d949ce4f555e29154746f292' 
  AND token = 'CxcuM75wHv4UKjRvJQ8hU3KUW04CWsbcq/5txgN9AvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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