Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24c0ab2a6bd56a81022f68b344e1713beae49cc30b0f9bd43526fdb1becb76a8' 
  AND token = 'c5bv8F543vJEcVaKTxD9g8SKMFzOPnbm7tkSS3j7eVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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