Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebef357134ebe87c70023bc17a25a8bd49b79f12a72142912691605f9a5c3abc' 
  AND token = '1/wxrej6Igo4FV1cZuyhucevwqlP0BW959MyeF3OqZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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