Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e0279f3266dd8f66d86d61ebbc28fb5ab75a0c1f407aa0777f365fa9680d31b' 
  AND token = 'l3bxhKqKk1NEr2dZdzMvHOzjLYsDk3az7cfY0ph3BNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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