Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25c553727f97220786722a2338913a7341e7c89518e380722b4d7fe912bc60ea' 
  AND token = 'xXsaReWEacPjVfx/e+nupXI+T0dyzyfANxd2jH2aKGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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