Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35c4b51185bd7661cc717594b8e9af63c79c348864e10a43ef99af53f678be98' 
  AND token = 'UwAMZ+Bf6MXdzjKe4eCFuGcFSIc65T5qoQ4iRxlV7uA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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