Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33735391c5a2df32247b6fb096e04a2d54d63babcdcca38a9a2f92b8738737d8' 
  AND token = '6sVj62D+iQEeG1aNfORLyMUws0MRfqt/MjsOf3tgrlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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