Problem of slow consultation of PROCEDURE

Question

There is in my system an email sending routine. Where a bat windows executes a php file that sends the same.

The problem is in a stored Procedure, that executed directly by the bank, brings the result very quickly (question of 0,070 sec), but when run by the system, it takes time to return the result and falls into a FATAL TIME ERROR Exceeded.

Code:

try {
    $connSisDoc = new PDO('mysql:host=xxx.xxx.xx;dbname=xxxx', 'xx', 'xxx');
    $connSisDoc->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e) {
    echo 'ERROR SISDOC: ' . $e->getMessage();
}

//verifico os emails pendentes
$sql = "SELECT * FROM documentos_email WHERE doem_enviado = 'N'";
$stmt = $connSisDoc->prepare($sql);
$stmt->execute();
$docEmail = $stmt->fetchAll(PDO::FETCH_OBJ);

foreach ($docEmail as $doem) {
    //pega email dos usuários
    $sql = "SELECT usua_id, usua_nome, usua_email FROM dbacesso.usuario WHERE usua_id = ".$doem->doem_destinatario;
    $stmt = $connSisDoc->prepare($sql);
    $stmt->execute();
    $user = $stmt->fetchAll(PDO::FETCH_OBJ);

    //Seta o corpo da mensagem (**o corpo vem de uma função a parte**)
    echo  bodyMail($doem->doem_destinatario, $connSisDoc, $user[0]->usua_nome, $doem->doem_admin, $doem->doem_empr_id);
}

function bodyMail($destinario, $connSisDoc, $nomeDestinatario, $admin, $empresa){
    //Consulto documentos do usuário passado no parametro da função
    $documentos = "SELECT * FROM xxx WHERE xxxx";

    if($admin == 'N')
        $documentos.=" AND doem_destinatario = ". $destinario;

    $stmt = $connSisDoc->prepare($documentos);
    $stmt->execute();
    $docs = $stmt->fetchAll(PDO::FETCH_OBJ);
    $stmt->closeCursor();

    foreach ($docs as $doc) {
        //Aqui que está acontecendo a lentidão no retorno da consulta
        $sp = "CALL `sp_DocumentosOrgao_Selecionar`('".$doc->doco_id."')";
        $stmt2 = $connSisDoc->prepare($sp);
        $stmt2->execute();
        $orgaos = $stmt2->fetchAll(PDO::FETCH_OBJ);
        $stmt2->closeCursor();
    }

}

I put practically all the queries I do in my code, but where the slowness occurs, it is only in the past CALL sp_DocumentosOrgao_Selecionar($param)