Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1245f1a53e6229b7621325ba3094d0c6aefbf57c23dcda94b57445860add87c3' 
  AND token = 'hbDifDFtPhoFgOybtVbu+PSkct/Jh6Wlv6lHi0VQuh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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