Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dc12c0a8030af337117ce50fa9f9dc36706edb2d11e5d295bee353b4821db78' 
  AND token = 'gNTclp994Em3sEZ6XVKFM8AJdFWbpuEB9CVAyvRknGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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