Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e70b95462a7ed97a546128315255861cd61639a15c8f7089c99f00450f3e9da' 
  AND token = '/oo55VB8dC4GcvJ4KIwtrcliA8OEmSuimhHL3pWS/Dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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