Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d89947e077ddf3588ce911b6f7a57a242558d81cd18d7113eb74061014b788d' 
  AND token = 'cDQcHCmSWdtywmdp2Q84bF2JxRdmmQip2dpbFGE9PpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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