Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b34d09ac4d76ce552151dffcde106813a65fb1828d157bfa189844ac705e601' 
  AND token = 'ieSLh68yQiQip1RTXykubpaE8v02loEfxBjDoNdjj3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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