Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '986cb49a27436811123a8b7ddb6ff34be712fbf0b31b477dbb6faed7c8693853' 
  AND token = 'fvloMFqo6DNMwKaAVpQIBbZ469nh2TJtsDFzl1awy7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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