Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53912632b09fa913ed28d991716ebc3992e013dc2f8b2d7b8136ebb409bf416f' 
  AND token = '1k97FKNjHnHUWoMOBTaBGtGQmYxeWszwg/UKvSideL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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