Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce0203241b2482779844404baa837d90741dc6acfe38e787416d42ab320b9729' 
  AND token = 'wBKX3/iSPvU3EYW5OQXQ05dou13BId+0L8bk8iXHBMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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